I have very interesting problem. In some games in certain locations FPS falls down to approximately 2 or 3. For example in "King's Bounty: the Legend". The game starts smoothly and runs smoothly, but when I enter some locations (training dungeon for example) the FPS becomes extremely low, if I quit this location fps becomes normal again. Changing graphics options to the lowest doesn`t solve the problem. The video driver is the latest available also. Maybe someone knows how to solve this issue?
I assume you already disabled shadows? And did "winetricks vcrun6"? ( http://appdb.winehq.org/objectManager.php?sClass=version&iId=19045&iTestingId=48557 ) http://wiki.winehq.org/Performance may have a few tips, e.g. try disabling glsl. If the problem persists please file a bug at http://bugs.winehq.org with recipe to reproduce problem using the freely downloadable demo.